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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     string str;
  8.     cin >> str;
  9.     int s = str.size();
  10.     int i;
  11.     string ans = str;
  12.     string ans2 = ans;
  13.     int changes = 0;
  14.     int changesStart = 0;
  15.     //cout << str << " " << ans << " " << ans2 << " ";
  16.     for(i = 0; i < s; i++) {
  17.         char c;
  18.         if(str[i] == 'a')
  19.             c = 'z';
  20.         else
  21.             c = str[i]-1;
  22.         ans2[i] = c;
  23.         if(ans2 < ans) {
  24.             if(i == 0 || changes == 0) {
  25.                 ans = ans2;
  26.                 changes++;
  27.                 changesStart = i;
  28.             }
  29.             else {
  30.                 if(changesStart == i-1) {
  31.                     ans = ans2;
  32.                     changes++;
  33.                     changesStart = i;
  34.                 }
  35.                 else
  36.                     break;
  37.             }
  38.         }
  39.         ans2 = ans;
  40.     }
  41.     cout << ans << endl;
  42.     return 0;
  43. }
Success #stdin #stdout 0s 3472KB
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language:

						
C++14 (gcc 8.3)

					

					

						
created:
								
						
8 years ago

					

					

						
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